Flaxborough, in Colin Watson's "Flaxborough Chronicles", is a thinly disguised Boston. An interesting basis for a layout, on the original Great Northern line (and, indeed, the site of the GNR's loco works before Doncaster) with lines to Grimsby and Sleaford as well as a docks branch. You would need quite a bit of space to do it justice. N gauge perhaps?
At the other end of the scale, John Hadfield's "Love on a Branch Line" features the line from Flaxfield to Arcady, which hints very strongly of the Mid Suffolk Light Railway. Flaxfield (surely the similarity to Laxfield is no coincidence) is the junction with the main line and the branch was, we are told, closed "four years ago"; the book was published in 1959. Lord Flamborough of Arcady Hall has bought the railway and operates a private service with an E4.